【摘要】 利用常规气象资料和NCEP再分析客观物理量场、卫星云图、多普勒雷达回波产品资料,对2007年7月13日发生在江汉平原中北部的暴雨过程进行了诊断分析。结果表明,(1)高空低槽东移是影响此次强降水过程的主要大尺度环流背景;(2)低层低涡暖切变和低空急流是暴雨的直接影响系统;(3)有利的热力水汽条件和动力条件是强降水产生和维持的机制;(4)卫星云图上"人"字型、"V"字型云系和多普勒速度资料上的"逆风区"、风切变可作为判断强降水落区落点的依据。更多还原

【Abstract】 Based on the conventional observations,satellite cloud images and Doppler radar data,a heavy precipitation process in the north of Jianghan Plain on 13 July 2007 is analyzed.The result shows that:(1) the low trough of upper air are the main large-scale circulation systems impacting this event;(2) the vortex and warm shear line of low-layer is the major systems;(3) the heat and water vapor conditions,and dynamic conditions are mechanism of the torrential rain;(4) cloud systems,upwind areas and shears can be used to judge the rainstorm areas.更多还原